I don't think anyone should be coerced into a field of study and I'm not sure if the "army" quote from the other poster should be taken literally. I read it as you should make sure society has enough in that basket to maximize welfare for all, but I could be interpreting them poorly.
When I hear arguments for STEM, what I and many others generally mean is that the pie-chart for things studied in school (Math, Language, Literature, History, Geography, PE, Sociology, Science, Art, Religion, Music...etc) should be tweaked a bit to where the Math, Science, and Technology subsections are bigger. If that means reducing the rest of the courses by some small percentage in order to do so, then so be it. Note that I'm not talking about eliminating anything entirely.
Regardless of chosen profession, I can't think of anyone who wouldn't be better off by being more scientifically and mathematically literate. At this point you might ask if the same couldn't be said for other subjects like music and I would disagree. Although all learning and knowledge should generally be considered a blessing, scientific reasoning is a force multiplier. Think of all the ignorance regarding vaccines, climate science...etc.